How To
Configure Single-Area OSPF on Cisco IOS
Static routes work fine until you have more than a few of them. Single-area OSPF is where most…
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How To
How To
OSPF Concepts Explained for CCNA: DR/BDR and LSDB
Every router running OSPF builds an identical map of the network and then works out its own best…
How To
Configure IPv6 Static Routes on Cisco (Link-Local & Floating)
IPv6 static routes look like their IPv4 cousins until you hit the parts that are genuinely different, and…
How To
Configure IPv4 Static Routes on Cisco (Default and Floating)
When the primary link drops, a backup route has to take over, and on a Cisco router that…
How To
How a Cisco Router Forwards a Packet (CEF, FIB, and Adjacency)
A packet arrives on one interface and leaves on another, and everything a router does happens in the…
How To
How to Read the Cisco IP Routing Table (show ip route)
Read the Cisco IP routing table with show ip route: route codes, administrative distance vs metric, longest-prefix match,…
How To
Configure EtherChannel (LACP) on Cisco Switches
Configure EtherChannel on Cisco switches with LACP: bundle two links into one Port-channel, verify with show etherchannel summary,…
How To
Configure Spanning Tree Protocol (Rapid PVST+) on Cisco Switches
Configure Spanning Tree (Rapid PVST+) on Cisco switches: elect the root bridge, read port roles and states, and…
How To
CDP and LLDP Network Discovery on Cisco Switches
Configure and read CDP and LLDP on Cisco switches: see what is on each port, run show cdp…
How To
How to Configure 802.1Q Trunking on Cisco Switches
Configure an 802.1Q trunk between Cisco switches: tag VLANs, set the native VLAN, prune the allowed list, and…
How To
How to Configure VLANs on a Cisco Switch
By default, a switch puts every port in one big broadcast domain. Sales, Engineering, the printers, and the…
How To
Best DDR5 RAM for a Homelab and Workstation
Buying DDR5 in 2026 is a different exercise than it was a year ago. An AI-driven DRAM shortage…